4
		3					7
3	7		4				5
			8
				1
8				6		7	3
4					6
	6

Difficulty: Very easy (0)

		5			1
	8			2	7		4
3	6
						2	5
1		4	6			7
		8			3

Difficulty: Very easy (0)

	3	2
						7
		3					8
		8					5
6					7
4					8
	2
					5	2

Difficulty: Easy (0)

		7
					3		8
			2
3				8		5	4
2	6		3				1
				3
8		3
					6

Difficulty: Very easy (0)